Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 311-59000 found under Screw Cap Hexagon Head by M B Companies Inc. The National Stock Number assigned to this part is 5305013242588, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 311-59000.